Mechanical movement



(No Model.)

P. DIEHL.

MECHANICAL MOVEMENT.

No. 465,363. Patented Dec. 15, 1891 UNITED STATES PATENT OFFICE.

PHILIP DIEHL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGERMANUFACTURING COMPANY OF NEW JERSEY.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 465,363, dated December15, 1891.

Application filed June 25, 1891. Serial No. 397,482. (No model.)

T0 0. whom it may concern:

Be it known that I, PHILIP DIEHL, a citizen of the United States,residing at Elizabeth, in the county of Union and State of New J ersey,have invented 'certain new and useful Improvements in MechanicalMovements, of which the following is a specification, reference beinghad therein to the accompanying drawings.

My invention has for its object to provide a novel mechanical movementby which a differential vibratory motion may be imparted to a bell-cranklever, the, movement of the said lever to be utilized for any desiredpurpose.

To this end my improved mechanical movement comprises a link one end ofwhich is connected to a stationary pivot-pin, a rotat ing crank, and abell-crank lever pivoted at its central or angular portion to the freeend of the said link and having the outer end of one of its arms jointedto the said crank, said stationary pivot-pin being arranged adjacent.

to the said rotating crank. lVhen mounted and operated in this manner,the said bellcrank lever will have a movement bodily up and down andwill also be vibrated on its pivotal connection with the link, so thatthe operated arm of the said lever will have a comparatively slowdownward movement, requiring-the time occupied by about two-thirds ofthe rotation of the crank-pin or slightly more, and will then movequickly upward during the time require for about one-third of therotation of the crank-pin or slightly less. In other words, the operatedarm of the bellcrank lever will move downward comparativcly slowly andupward comparatively quickly.

My invention may be utilized in sewing or other machines where theabove-described peculiar movements of the bell-cranklever may bedesired.

In the accompanying drawings, Figure 1 is an elevation to illustrate theconstruction of myimproved mechanicalmovement; andFigs. 2 and 3 areviews similar to Fig. 1,but show ing the parts in different positions.

A denotes a link secured at one end to a stationary screw or pivot-pina.

B is a rotating crank, herein shown as consisting of an ordinarycrank-disk provided with a crank-pin b. f

O is a bell-crank lever, jointed at its middle or angular portion at cto the free end of the linkA and havingits lower arm connected to thecrank-pin b.

The pivot-pin a, it will be observedfls adj acent to the disk carryingthe crank-pin b.

The operation of the above-described construction is as follows: Whenthe crank-disk is rotated as denoted by the arrows, the outer end of thehorizontal arm of the bell-crank lever will be in its highest positionwhen the parts are as represented in Fig. 1. As the crank rotates thebell-crank lever will be caused to descend bodily, while thecrank-pin 1) moves from the position shown in Fig. 1 to the positionshown in Fig. 2, in which latter figure the said crank-pin isrepresented as being in its lowermost position. As the said crank-pinmoves upward from the position shown in Fig. 2 to that shown in Fig. 3,the

bell-crank lever will be vibrated on its pivotal'connection' with thefree end of the link A so that its outer arm will continue to descend,Fig. 3 showing the free end of the said outer arm as being in itslowermost position. Thus the free end of the said outer arm will havebeen descending comparatively slowly during rather more than two-thirdsof the revolution of the crank, and while the said crank is moved fromthe position shown in Fig. 3 to that shownv in Fig. 1 the-said leverwill be moved upward bodily,'and will also be vibrated on its pivotalconnection with the link A, thereby causing the free end of its outerarm to move upward quickly or in about one-half of the time or a littleless occupied by-it in its descent.

From the foregoing it will be apparent that lam enabled to impart adifferential vibratory movement to the operated arm of the bell-cranklever from a uniformly-rotating crank-pin. T-his diiterential movementmay be utilized for any purpose for'which it may be adapted in machinesof any kind.

Having thus described my invention, I claim and desire to secure byLetters Patent- A mechanical movement consisting of the In testimonywhereof I affix my signature in comblnation, with a rotating crank, of alink presence of two witnesses. one end of which is connected to astationary pivot arranged adjacent to said crank, and a PHILIP DIE HL. 5bell-crank lever pivoted at its middle or an- WVitnesses:

gular portion to the-free end of said link and J. G. GREENE,

having one of its arms connected to said crank. WV. WV. OOVELL.

